| 학회 | 한국화학공학회 |
| 학술대회 | 2016년 봄 (04/27 ~ 04/29, 부산 BEXCO) |
| 권호 | 22권 1호, p.827 |
| 발표분야 | 재료 |
| 제목 | Self-assembled Si/graphene-based composites for high capacity lithium-ion battery anodes |
| 초록 | Energy storage devices based on lithium-ion batteries (LIBs) with high energy density are highly demanding in many electrified vehicles (x-EV). As anode material for LIBs, commercial graphite have shown its limitation in increasing the energy density of LIBs due to its low theoretical capacity (372mAh/g). Among many candidates, silicon is the most attractive one because of its high theoretical capacity (3572 mAh/g) and relatively low working voltage. However, its huge volume expansion (~300%) during cycling causes electrode pulverization leading to excessive electrolyte consumption and finally to deterioration of cycle stability. To tackle these problems, we fabricated novel Si/graphene/C composites. For this purpose, we used an electrostatic self-assembly between amine-functionalized Si nanoparticles (SiNPs) and graphene oxide (GO) in an acidic solution followed by additional carbon coating on Si/GO assemblies to form rigid carbon scaffold on the outer surface of Si/graphene particles. The Si/graphene/C composites showed much improved cycling stability than Si/graphene composite. Their electrochemical properties were characterized by cycling test, cyclic voltammetry (CV) and impedance analysis. etc. |
| 저자 | 김나현 , 이정규 |
| 소속 | 동아대 |
| 키워드 | 화공나노소재 |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
